Magnetek DSD 412, Техническое руководство

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STANDARD CONTROL/DISPLAY OPERATION
43
NOTE:
Armature current is circulated through the
armature circuit during parts of the PCU
Parameter Measurement function. The PCU
will reduce the field current to zero on motors
with a shunt field in order to minimize motor
rotation. If the PCU detects significant motor
voltage during the test, the PCU parameter
measurement function will abort.
Ripple Filter Consideration
It is important to note that when applying a
LRC output filter (Ripple Filter), the drive
performance will be affected. For this reason,
it is necessary to run the SELF-TUNE test
with the output configuration that will be used .
For example, if the filter is used with the
capacitor fuse installed, then the SELF-TUNE
test must also be run with the filter fuse
installed. If the capacitors are not needed,
then the fuse should be pulled and the SELF-
TUNE test should be run with the fuse pulled.
The process for accessing the PCU
PARAMETER MEASUREMENT function is as
follows:
1) Use the ▲ and ▼ keys to select
function 997 from the function level. The two
colored LEDs remain off during this step.
9 9 7
Both LEDs Off
2) Press the DATA/FCTN key to enter the
"Data" level for Function 997. The green LED
is now lit to indicate that this function is
currently being accessed. The SCDU
displays the word 'Prot' if the NV RAM
PROTECTION switch is in the position that
will not allow any updates to the NVRAM:
P r o t
If the ‘Prot’ message appears, press the
DATA/FCTN key to return to the "Function"
level, move the NVRAM PROTECTION switch
to the "OFF" position, and press the
DATA/FCTN key again. The SCDU will jump
to step #3 when the NVRAM PROTECTION
switch is in the correct position upon entering
this function.
3) The SCDU displays the word ‘Entr’ to
prompt the user to press the ENTER key as
further confirmation that the PCU parameter
measurement function is about to be
performed:
E n t r
Green LED Lit
4) Press the ENTER key to actually start the
PCU Parameter Measurement function. The
PCU will not begin the measurement routine if
a SEVERE PCU FAULT exists. The PCU will
declare a SEVERE FAULT under several
conditions including an IST fault, power
supply failure, line sync loss, low line, or DCU
failure. If a SEVERE FAULT exists when the
PCU starts the parameter measurements, the
SCDU displays:
S F L t
Green LED Lit
Severe faults can only be cleared by pressing
the reset button on the Drive Control PCB, by
cycling power to the drive, or by replacing the
bad component if applicable. The SCDU
displays the word ‘tESt’ while it is performing
the parameter measurements and there were
no SEVERE FAULTS when the ENTER key
was pressed: